add support 4g -- >ppp

hc

2023-11-24 2b26ab132d1b33b91c84c6d732456200e8c5ee77

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# Locally computed:
sha256  5f7e8c835ee49a9e6dcf89f4e8ccbe724b061c0fc8565b504dd8b3e67ab79f82  dtach-v0.9.tar.gz